JP7232941B2 - reusable ultrasound scalpel - Google Patents

Description

The present invention relates to the field of medical devices, and more particularly to ultrasonic scalpels.

An ultrasonic scalpel is an ultrasonic vibration obtained by a piezoelectric transducer (an energy generator transmits electrical energy to the piezoelectric transducer, and the piezoelectric transducer converts the electrical energy into ultrasonic mechanical energy). It is an instrument that amplifies and uses the amplified ultrasonic vibrations to cut and coagulate soft tissue with the tip of a scalpel. With such instruments in the clinic, lesion resection can be achieved at lower temperatures and less bleeding, ensuring minimal lateral tissue thermal injury. With the spread of minimally invasive surgery, ultrasonic scalpels have already become common surgical instruments.

An ultrasonic scalpel generally includes a transducer, a handle, and a scalpel holder assembly at the distal end of the handle. A conventional ultrasonic scalpel holder assembly has an ultrasonic scalpel holder, an inner tube, and an outer tube, and the inner tube is positioned between the female holder and the outer tube, and is spaced apart by a certain distance along the axial direction. By moving, the movable clamp can be opened and closed, and the movable clamp can be brought into contact with or separated from the farthest end of the scalpel holder to achieve clamping and cutting of the target living tissue.

However, such an ultrasonic scalpel has the drawback that the handle housing and knife holder assembly are non-removable structures and cannot be recovered once removed. In view of the structure of the scalpel holder assembly, the inner and outer tubes are open at the scalpel blade site, ie, the surgical site. When the scalpel holder is stationary, the liquid tissue at the surgical site permeates through the opening at the end of the tube into the inside of the scalpel, that is, between the inner tube and the outer tube, and between the inner tube and the knife holder, due to capillary action. Therefore, when the scalpel holder vibrates, the silica gel support ring in the scalpel holder becomes a piston that vibrates at the same frequency as the scalpel holder, and the liquid tissue is strongly sucked into the gap between the scalpel holder body and the inner tube. After dismantling the discarded ultrasonic scalpel, solidified fat-like substances and blood scabs were observed on the entire scalpel holder body and on the side of the outer wall of the inner tube near the scalpel blade, especially on the entire scalpel holder body. In addition, the scab phenomenon is more severe. After one or even multiple surgeries are completed, the structure and performance of the ultrasonic scalpel remain intact, but the interior of the scalpel cannot be thoroughly cleaned and disinfected. Therefore, according to the standards, the ultrasonic scalpel can only be used as a disposable surgical instrument and should be discarded immediately after the operation is completed. Reusing a used ultrasonic scalpel on the next patient without thoroughly cleaning and disinfecting it will inevitably increase the risk of cross-infection, which is a huge risk due to medical vice. hidden.

In view of this, Chinese patents CN201410023651.2, CN201810130712.3, CN201810871843.7, and CN2018111114966.2 designed some replaceable female holder assemblies, but these assemblies have relatively complicated structures. , the manufacturing cost is relatively high, and it is difficult to assemble. For example, the base of the cannula assembly provided on the outer circumference of the female holder uses a metal member, and the process of tube expansion, spinning, etc. is used to realize the installation of the inner and outer cannula. Some have low processing efficiency and high cost, and some have no function to prevent reversal, so minute displacement occurs during ultrasonic vibration and may affect surgical accuracy. be.

Chinese Patent CN201410023651.2 Chinese Patent CN201810130712.3 Chinese Patent CN201810871843.7 Chinese Patent CN201811114966.2

SUMMARY OF THE INVENTION The present invention provides a reusable ultrasonic scalpel to solve the problems of the prior art.

In order to solve the above technical problems, the technical solutions of the present invention are as follows.
A reusable ultrasonic scalpel includes a handle assembly and an ultrasonic scalpel holder extending from its distal end and used to transmit ultrasonic mechanical energy, and is fitted over the ultrasonic scalpel holder. A tube assembly is provided and is removably connected to the handle assembly by a quick connect mechanism.

Preferably, said cannula assembly comprises an inner cannula assembly and a cannula assembly fitted together, said inner cannula assembly comprising an inner cannula and an cannula base secured to its proximal end, said The mantle assembly includes a mantle and a mantle base fixed to its proximal end, the inner mantle being positioned between the ultrasonic scalpel holder and the mantle and spaced apart along the axial direction. Movement can open and close the movable clamp to bring the movable clamp into contact with or away from the farthest end of the female holder, the inner and outer cannula assemblies being fixed in a circumferential direction, and the outer cannula. The base is axially secured via a first quick connect mechanism to a female rotating wheel provided at the distal end of the handle assembly, and the inner cannula base is secured via a second quick connect mechanism. It is axially fixed to a spring seat as part of the drive mechanism provided within the handle assembly.

Preferably, the first quick connect mechanism comprises a first boss provided on the outer peripheral surface of the proximal end of the cannula base and an L-shaped groove provided axially within the female rotary ring. and both fit together.
Preferably, the second quick connect mechanism comprises a second boss provided on the outer peripheral surface of the proximal end of the inner cannula base and an L-shaped hanger axially provided on the spring seat. and both fit together.

Preferably, the axial travel of said first boss in said L-shaped groove is greater than or equal to the axial travel of said second boss in said L-shaped hanger.

Preferably, a first plane is provided on the inner peripheral surface of the outer tube base, a second plane is provided on the outer peripheral surface of the inner tube base, and the outer tube base is provided on the outer peripheral surface of the inner tube base. Enclosed on the outer circumference, the first plane and the second plane interact to limit circumferential rotation of the inner step assembly and the outer tube assembly.

Preferably, the female rotating wheel includes a female thread and a male threaded cannula attachment knob is screwed thereto, the end surface of the proximal end of the cannula attachment knob always biasing against the cannula base and extending therefrom. is secured between the cannula attachment knob and the female rotary wheel.

Preferably, the end face of the distal end of the cannula base is stepped flat and engages a boss at the proximal end of the cannula mounting knob.

Preferably, the inner cannula and inner cannula base are realized using an insert molding process or adhesive bonding.

Preferably, the mantle and mantle base are realized using an insert molding process or adhesive bonding.

Preferably, the handle assembly and the ultrasonic scalpel holder are each manufactured using high temperature resistant materials.

The beneficial effects of the present invention are mainly as follows. That is, it has the advantages of secure attachment, easy removal, easy cleaning and disinfection, rapid replacement of the cannula assembly as a consumable item, reusability of other parts, cleaning and high-temperature Various methods of sterilization, including steam sterilization, are possible, greatly reducing the cost of surgical consumables, reducing patient burden, and reducing the risk of cross-infection during ultrasonic scalpel use.

1 is a schematic diagram of the three-dimensional structure of an ultrasonic scalpel of the present invention; FIG. 1 is an exploded schematic view of the cannula assembly of the ultrasonic scalpel of the present invention; FIG. FIG. 4 is a partial cross-sectional view to show the connection between the cannula assembly and the handle in the ultrasonic scalpel of the present invention; FIG. 4 is an exploded schematic view of the connection structure between the cannula assembly and handle of the ultrasonic scalpel of the present invention; 1 is a structural schematic diagram of an inner cannula assembly of an ultrasonic scalpel of the present invention; FIG. 1 is a structural schematic diagram of the mantle assembly of the ultrasonic scalpel of the present invention; FIG. 1 is a schematic diagram of the overall structure of the cannula assembly of the ultrasonic scalpel of the present invention; FIG. FIG. 3 is a schematic diagram of the three-dimensional structure of the mantle tube base of the ultrasonic scalpel of the present invention; FIG. 4 is a schematic three-dimensional structural view of the mantle base of the ultrasonic scalpel of the present invention viewed from another direction; FIG. 3 is a schematic diagram of the three-dimensional structure of the inner cannula base of the ultrasonic scalpel of the present invention; FIG. 3 is a schematic diagram of the three-dimensional structure of the scalpel rotary wheel of the ultrasonic scalpel of the present invention; FIG. 3 is a cross-sectional view of a scalpel rotary wheel of the ultrasonic scalpel of the present invention; FIG. 3 is a schematic diagram of mounting the cannula mounting knob and the cannula base of the ultrasonic scalpel of the present invention; Fig. 2 is a schematic diagram of the connection between the cannula assembly and handle of the ultrasonic scalpel of the present invention; Fig. 2 is a schematic diagram of the connection between the cannula assembly and handle of the ultrasonic scalpel of the present invention; Fig. 2 is a schematic diagram of the connection between the cannula assembly and handle of the ultrasonic scalpel of the present invention; Fig. 2 is a schematic diagram of the connection between the cannula assembly and handle of the ultrasonic scalpel of the present invention; FIG. 4 is a schematic diagram of the connection between the inner cannula base and the spring seat of the ultrasonic scalpel of the present invention; FIG. 4 is a schematic diagram of the connection between the inner cannula base and the spring seat of the ultrasonic scalpel of the present invention; FIG. 4 is a schematic diagram of the connection between the inner cannula base and the spring seat of the ultrasonic scalpel of the present invention;

Hereinafter, the present invention will be described in detail according to specific embodiments shown in the drawings. However, the present invention is not limited to these embodiments, and any structural, method or functional transformations made by persons skilled in the art based on these embodiments shall fall within the protection scope of the present invention. .

In describing solutions, the terms center, top, bottom, left, right, front, back, vertical, horizontal, inner, outer ”, etc., are those shown based on the drawings, and are merely for the convenience and simplification of explanation, and the devices or elements shown always have a specific orientation. It should be explained (understood) that it is not intended or implied to have, be configured and operated in any particular orientation, and thus cannot be taken as limiting the present invention. Also, the terms "first", "second" and "third" are for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, in the description of the means for solving the problem, with the operator as a reference, the method of approaching the operator is defined as the "proximal end" (base end), and the direction away from the operator is defined as the "distal end" (tip).

As shown in FIGS. 1-3, the present invention includes a handle assembly and an ultrasonic scalpel holder 4 extending from its distal end (tip) and used to transmit ultrasonic mechanical energy. A reusable ultrasonic scalpel is disclosed. In general analogy to the prior art, the handle assembly of the present invention comprises a housing 12, a power touch module 11 disposed within the housing 12 for controlling ultrasonic energy output, and It includes a trigger 16 and a manual button 17 pivotally mounted on the housing 12 . The trigger 16 transmits force to the spring assembly 10 via transmission structural members 14, 15, and the manual button 17 is used to trigger the power touch module. A reset spring 13 for resetting the transmission structural members 14 and 15 is further included in the housing 12 . The specific structure and working principle of the handle assembly are almost the same as those in the prior art, so the details will not be described again here.

A cannula assembly 1 is mounted on the outside of the ultrasonic scalpel holder 4, and the cannula assembly 1 is detachably connected to the handle assembly by a quick connect mechanism. Specifically, the cannula assembly 1 includes an inner cannula assembly and a cannula assembly fitted together, the inner cannula assembly being fixed to an inner cannula 3 and its proximal end. The outer tube assembly includes an outer tube 2 and an outer tube base 6 fixed to its proximal end, and the inner tube 3 includes the ultrasonic scalpel holder 4 and the outer tube. 2 and moving a fixed distance along the axial direction, the movable clamp 20 can be opened and closed to bring the movable clamp 20 into contact with and away from the farthest end of the female holder. .

As shown in Figures 5-12, between said cannula assembly 1 and handle assembly in the present invention there is a quick connect mechanism comprising a first quick connect mechanism and a second quick connect mechanism. The outer cannula base 6 is axially fixed via a first quick connect mechanism to a female rotating wheel 8 provided at the distal end of the handle assembly, and the inner cannula base 7 is connected to a second quick connect. It is axially fixed to a spring seat 9 as part of the drive mechanism provided in the handle assembly via a connecting mechanism. The first quick connection mechanism includes a first boss 6b provided on the outer peripheral surface of the proximal end (proximal end) of the outer tube base 6, and an axial direction provided in the female rotary ring 8. L-shaped groove 8a and both fit into each other. The second quick connection mechanism includes a second boss 7a provided on the outer peripheral surface of the proximal end (proximal end) of the inner cannula base 7 and an axially provided on the spring seat 9. and an L-shaped hanger 9a (see FIG. 15), both of which fit together.

Generally, the axial displacement of the first boss 6b in the L-shaped groove 8a is equal to the axial displacement of the second boss 7a in the L-shaped hanger 9a, and thus both are exactly Can be mated. In practice, the axial displacement of the first boss 6b in the L-shaped groove 8a is slightly greater than the axial displacement of the second boss 7a in the L-shaped hanger 9a, thus: The first boss 6b of the outer tube base 6 can first slide into the L-shaped groove 8a and play the role of axial movement guide, in the technical solution, the first boss 6b and the second boss 7a move axially simultaneously to the horizontal fold ends of the L-shaped groove 8a and the L-shaped hanger 9a, respectively.

A first flat surface 6c is provided on the inner peripheral surface of the outer tube base 6, and a second flat surface 7b is provided on the outer peripheral surface of the inner tube base 7. The first plane 6c and the second plane 7b are mounted on the outer periphery of the base 7 and interact to limit the circumferential rotation of the inner tube assembly and the outer tube assembly. no rotation occurs.

the female rotary wheel 8 includes an internal thread and a cannula mounting knob 5 having a male thread is screwed thereto, the end surface of the proximal end of the cannula mounting knob 5 constantly biasing against the cannula base 6; It is fixed between the cannula attachment knob 5 and the female rotary wheel 8 . Furthermore, the end face of the distal end of the cannula base 6 is a stepped flat surface 6a which engages the boss 5a of the proximal end of the cannula mounting knob 5. As shown in FIG.

4, 13, 14a-14d and 15a-15c, the process of removing the cannula assembly of the ultrasonic scalpel of the present invention is illustrated.

When installing the disposable cannula assembly, the first boss 6b of the cannula base 6 is aligned with the L-shaped groove 8a of the female rotary wheel 8 and is slid into the female rotary wheel 8 in the direction of the arrow in FIG. , and the L-shaped groove 8a of the female rotating ring 8 have a guiding function, so that the second boss 7a of the inner tube base 7 is also aligned with the L-shaped hook 9a of the spring seat 9 at the same time. .

Once the disposable cannula assembly has been smoothly slid onto the bottom of the female rotating wheel 8, it rotates in the direction of the arrow shown in FIG. A connection with the female rotating wheel 8 is realized. At this time, the cannula assembly may not rotate to the predetermined position or may rotate in the opposite direction of the arrow. Inversion can be prevented, screwing in the female wheel 8 in the direction shown in Figure 14c and tightening completes assembly of the cannula assembly.

The specific principle of anti-reversal is as follows. When the disposable cannula assembly is assembled, the cannula base 6 has a stepped flat surface 6a so that when the cannula mounting knob 5 is rotated in the direction shown in FIG. The end boss 5a contacts the stepped flat surface 6a and applies a constant force to the flat surface 6a, so that the outer tube base 6 receives a constant torsional force. This torsional force serves two purposes. First, the cannula assembly that has not been rotated into position can be rotated to the lateral groove end of the L-shaped groove 8a of the female rotary wheel 8, thus ensuring the accuracy of the mounting position of the cannula assembly. and this torsional force then has an anti-loosening and anti-reversal effect. Of course, the stepped plane 6a may also be a smoothly transitioning slanted end face, ie only the end face at the distal end of the outer tube base 6 has a height difference.

In the present invention, when assembling the disposable cannula assembly, the specific connecting process of the inner cannula base 7 and the spring seat 9 is as follows. 15a-15c, the second boss 7a of the inner tube base 7 is slid along the L-shaped hook 9a of the spring seat 9 to the bottom, and then rotated in the direction of the arrow in FIG. , the second boss 7a is locked in the lateral groove of the L-shaped hanger so that there is no axial relative movement between the inner cannula base 7 and the spring seat 9; First, the connection between the inner cannula base 7 and the spring seat 9 is realized.

The present invention does not specifically require the number of first bosses 6b and second bosses 7a. Those skilled in the art should know that there may be one, two, or more than two. The inner tube 3 and the inner tube base 7, and the outer tube 2 and the outer tube base 6 are all realized using an insert molding process or bonding with an adhesive to produce a connecting structure. be. Generally, cannula assemblies are made using a flaring process for the end connection structure, resulting in dimensional instability and a high scrap rate during manufacturing. Using the insert molding process or adhesive bonding in the present invention can not only reduce the waste rate of the product, but also make more complex structures to realize functions.

The handle assembly and the ultrasonic scalpel holder 4 according to the present invention are each manufactured using high temperature resistant materials (high temperature resistant plastics such as PPA, PEI, etc., high temperature resistant metals such as titanium alloys, stainless steel, etc.), and are cleaned and sterilized with high temperature steam. is possible. The present invention is easy to put on and take off, allowing the user to put on and take off the cannula assembly and the reusable part within a very short time, and is easy to use in the hospital.

The above are only preferred embodiments of the present invention, and the preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope limited by the claims. It should be pointed out that Persons skilled in the art can make some improvements and modifications without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

1 sleeve assembly 2 sleeve 6 sleeve base 6b first boss 6c first plane 3 inner sleeve 7 inner sleeve base 7a second boss 7b second plane 4 ultrasonic scalpel holder 5 sleeve Tube mounting knob, 5a End boss 8 Female rotating ring, 8a L-shaped groove 9 Spring seat (spring seat), 9a L-shaped hanger

Claims (7)

A reusable ultrasonic scalpel comprising a handle assembly and an ultrasonic scalpel holder (4) extending from its distal end and used to transmit ultrasonic mechanical energy,
A cannula assembly (1) is mounted outside said ultrasonic scalpel holder (4), said cannula assembly (1) is detachably connected to said handle assembly by first and second quick connect mechanisms. ,
Said cannula assembly (1) comprises an inner cannula assembly and a cannula assembly fitted together, said inner cannula assembly comprising an inner cannula (3) and an cannula base fixed to its proximal end. (7), said cannula assembly comprising a cannula (2) and a cannula base (6) secured to its proximal end;
The inner tube (3) is positioned between the ultrasonic scalpel holder (4) and the outer tube (2), and moves a fixed distance along the axial direction to move the movable clamp (20). can be opened and closed to bring the movable clamp (20) into and out of contact with the farthest extremity of said ultrasonic scalpel holder;
the inner cannula assembly and the outer cannula assembly are circumferentially fixed;
said cannula base (6) is axially fixed to a female rotating wheel (8) provided at the distal end of said handle assembly via a first quick connect mechanism;
said inner cannula base (7) is axially fixed to a spring seat (9) as part of a drive mechanism provided in said handle assembly via a second quick connect mechanism;
Said first quick connect mechanism comprises a first boss (6b) provided on the outer peripheral surface of the proximal end of said cannula base (6) and axially within said female rotary wheel (8). and an L-shaped groove (8a) fitted together, both (6b, 8a) being fitted together;
Said second quick connect mechanism comprises a second boss (7a) provided on the outer peripheral surface of the proximal end of said inner cannula base (7) and axially provided on said spring seat (9). an L-shaped hanger (9a) fitted together, both (7a, 9a) fitting together;
the axial displacement of the first boss (6b) in the L-shaped groove (8a) is greater than or equal to the axial displacement of the second boss (7a) in the L-shaped hanger (9a);
A reusable ultrasonic scalpel characterized by: A first plane (6c) is provided on the inner peripheral surface of the outer tube base (6), a second plane (7b) is provided on the outer peripheral surface of the inner tube base (7), A tube base (6) is mounted on the outer periphery of said inner tube base (7), and said first plane (6c) and second plane (7b) interact to form said inner tube assembly. 2. The reusable ultrasonic scalpel of claim 1 , wherein circumferential rotation of the cannula assembly is limited. Said female rotary ring (8) includes a female thread, and a cannula mounting knob (5) having a male thread is screwed thereto, said cannula mounting knob (5) having a proximal end face extending from said cannula base ( 6) is always biased to fix it between the cannula attachment knob (5) and the female rotary wheel ( 8 ). ultrasonic scalpel. The end face at the distal end of the cannula base (6) is characterized by a stepped flat surface (6a) which engages with a boss (5a) at the proximal end of the cannula mounting knob (5). A reusable ultrasonic scalpel according to claim 3 . Reusable ultra-thin tube according to claim 1 or 2 , characterized in that the inner cannula (3) and the inner cannula base (7) are realized using an insert molding process or adhesive bonding. sonic scalpel. Reusable ultrasonic scalpel according to claim 1 or 2, characterized in that the mantle (2) and mantle base (6) are realized using an insert molding process or adhesive bonding. . A reusable ultrasonic scalpel according to claim 1, characterized in that said handle assembly and ultrasonic scalpel holder (4) are each made of high temperature resistant material.

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